Steam-engine.



PATENTED MAR. 22, 19104.

J. M. CLARK.

STEAM ENGINE.

APPLICATION FILED APR. 11, 1903.

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Patented March 22, 1904.

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PATENT JOHN M. CLARK, OF WHIT-ESTONE, NEW YORK.

STEAM-ENGINE.

SPECIFICATION formingpart of Letters Patent No. 755,453, dated March 22,1904.

Application filed April 11, 1903.

To all whom it may concern.-

Be it known that I, JOHN M. CLARK, a citizen of the United States,residing at Whitestone, in the county of Queens and State of New York,have invented new and useful 1mprovements in Steam-Engines, of which thefollowing is a specification.

This invention relates to improvements in steam-engines of a typewherein the cylinder and the piston are reciprocated in oppositedirections; and the object is to provide an improved and simplifiedsteam-engine of the kind stated characterized by a novel valvearrangement for controlling the inlet and exhaust of the motive fluid.

With this object in view the invention consists in the novelconstruction of parts and their assemblage or aggroupment in operativecombination, as will be hereinafter fully specified, and the noveltyclaimed particularly pointed out and distinctly declared.

This invention is fully and clearly illustrated in the accompanyingdrawings, to be taken as a part of this specification, and whereinFigure 1 is a view in elevation of the complete mechanism, thesteam-cylinder and the valve-chest being shown in vertical centralsection. Fig. 2 is a side elevation of the supporting-frame, thesteam-chest, and the steamcylinder. 7

Referring to the drawings, 1 designates a proper supportingbase, fromwhich rise strong standards 2, having their lower ends firmly fixed inor to the base 1 and their upper ends connected by cross-pieces 3, fromthe center of which the vertical slide-rods 1 rise, having their lowerends fixed to the crosspieces and extending the proper height parallelwith each other, as shown in Fig. 1 of the drawings.

5 designates the steam-cylinder, which may be of the usual constructionand of such capacity as may be desired or required. Diametricallyopposite to each other closely adjacent to the upper and lower ends ofthe steam-cylinder are bearing-lugs 6, formed with apertures whichslidably take on the standards 1 and guide the cylinder in itsreciprocations. The cylinder is provided with the usual heads Serial No.152,214. (No model.)

to the crank-rod 12, which has its lower end connected to the wrist ofthe main crank of the driving-shaft 13.

14 15 designate bearing-blocks secured on the base'l and provided withthe proper bearings wherein the shaft 13 is revolubly mounted andsecured against displacement by the usual caps 16.

The driving-shaft 13 is a triple crank-shaft having a main crank 17central between the bearings and to which the crank rod 12 is connected.A crank 18 19 is arranged on each side of crank 17, the cranks 18 19being arranged opposite in direction to the crank 17, substantially asseen in the drawings. To the wrists of the cranks 18 19 are pivotallyconnected the lower ends of connecting rods 20, the upper ends of whichare jointed to short hangers 21, formed on or secured to the lower headof the steam-cylinder. The main crank 17 has the same stroke as theshorter cranks 18 19 in order that the piston shall have double thestroke of the cylinder in order to permit the piston to pass the quarterdead-points, and thus increase the power, and the cylinder and piston,it is intended, shall balance each other. It will be perceived that bythe opposite disposition of the cranks the initial movements of thecylinder and the piston are in opposite directions and that by thearrangement of the cranks those relative movements are continued.

To the supporting-frame is secured stout cross-pieces 22, extendedbeyond the frame the proper distance and provided with verticalstandards 23, which support the steamchest 24, formed with oppositelydirected steam-passages 25 26 to direct the steam to the upper and lowerends of the cylinder. These steamways open into steam-sleeves 27 28,which lead into the steam-pipes 29 30, opening into the steam-cylinderat the upper and lower ends thereof, respectively, and consequentlyabove and below the piston-head, as is clearly indicated in thedrawings. An escape-port 31 is provided in the steam-chest, as usual,and in the steam -chest is made the usual valve-chamber 32, wherein isslidingly posited the slide-valve 33, formed with the usual recess tostraddle either steamway and the exhaust-port. To the slide-valve issecured a valve-rod 34:, the outer end of which is suitably connected toa rod 35, the lower end of which is fastened to a strap 36, mounted onan eccentric 37 on the driving-shaft 13. Of course the valve connectionsare so arranged as to act to produce the required effects on theassociated reciprocable cylinder and piston. The end portions of thesteam-pipes 29 and are slidably' arranged in the sleeves 27 28, but donot reach the full length thereof, so as to leave a steam-space at theirends, as shown in the drawings. A steam-pipe 38 enters the Valve-chamberand leads from a well-known source.

The operation is readily perceived from the foregoing description, takenin connection with the drawings. Steam being let into the steam-chest,it finds its way through the open port into the steam-cylinder andpushes the piston in direction of the applied force, which eventuates inrotating the driving-shaft, which in sequential order moves the cylinderin the opposite direction to the movement of the piston, and theserelative movements are continned throughout the operation and with theattained results of increased power and expedited action.

Having thus fully described the invention, what is claimed as new is 1.In a single-acting steam-engine, the combination of a reciprocablesteam-cylinder, a reciprocable piston in the steamcylinder, means tooperate the cylinder and the piston in relatively opposite directions, avalve-chest formed with sleeves, oppositelyextending the cylinder toreciprocate them in relatively opposite directions, and an eccentric onthe crank-shaft and connected to the valve.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN M. CLARK.

Witnesses:

CLINTON T. Ron, ISRAEL J. MERRITT.

